/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraMessages.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)(Abstract, MinimalAPI) class UNiagaraMessageData : public [UNiagaraMessageDataBase](API\Plugins\Niagara\UNiagaraMessageDataBase)